Rivet-cutting device



.Feb.- 12 1924.

J A. CALDER RIVET CUTTING DEVICE Filed July 13. 1921 4 Sheets-Sheet 1 1 1924. v 1,483,072 Feb J. A. pALDER RIVET CUTTING DEVICE Filed Julyv 15. 1921 4 sheetsrsheet 2 v Feb. 12 1924; 1,483,072 v J. A. CALDER RIVE'I CUTTING DEVICE Filed July 13. 1921 4 Sheets-Sheet s Q Q m Feb. 12 1924. 1,483,072 J. A. CALDER v RIVET CUTTING DEVICE Filed July 13 1921 4 Sheets-Sheet 4.

30 I jg 20 1a 78 J3 r I: j l I.

\(\(( miuuh TATES PATENT OFFICE.

JOHN -A. CALDER, OF TORRINGTON, CONN COMPANY, OE TORRINGTON, CONNECTICUT, A. CORPORATION ECTICUT, ASSIG-NOR TO THE TORRINGTON OF CONNECTICUT.

RIVET-CUTTING DEVICE.

Applicationfiled July 13, 1921. Serial No. 484,406.

To all whom it may concern:

Be it known that 1, JOHN A. CALDER, a citizen of the United States, residing at Torrington, in the county of Litchfield, State of Connecticut, have invented certain new. and useful Improvements in Rivet-Cutting Devices, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements in rivet cutting devices, and more particularly to a rivet *cutting device which operates to cut the rivet after it has been placed in the article to be riveted at each side of the article and leaving only sufficient projecting portions of the rivet for the heading thereof.

An object of the invention is to provide a. machine of the above type with devices movable into position for holding the article to be riveted and devices which are automaticallymovable subsequent to the holding devices for cutting the rivet.

A further object of, the invention is to provide a machine of the above type, wherein the holding devices move in a direction at right angles to the direction of movement of the rivet cutting devices.

A still further object of the invention is to provide a machine of the above type with means for positioning the rivet so that it is free from engagement by the cutting devices as the cutting devices are moved relative to each other for engaging and holding the article preliminary to cutting.

A still further object of the invention is to provide a machine of the above type, wherein the rivet positioning means is automatically withdrawn when the cutters are moved forward for cutting the rivet.

These and other objects will in part be obvious and will in part be hereinafter more fully described. I

In the drawings which show by way of illustration one embodiment of the invention- Figure 1 is a side view of a machine embodying my improvements;

Figure 2 is a front View of the same and prior to the actuation of the cutting members:

Figure 3 is a similar view of the machine but after the cutting members have been actuated to cut the rivet;

Figure 4; is a plan view of the machine;

Figure 5 1s a view on the l1ne 5-5 of Figure 1;

FigureG and partly in sect-ion from the right of'the machine is aview partly in side elevation 1 Figure Tis a view showing more'or less diagrammatically the position of the cutters and thepositioning plate when the needle is first placed in the'machine;

Figure' S is a similar view but showing the upper pair of cutters lowered into holding engagement with the needle;

Figure 9 is a similar view but showing the positioning plate retracted and the cut-' ters moved forward for severing the rivet.

Figure 10 is an enlarged side view of a portion of one of the cutting members;

Figure 11' is a similar view'but showing a. modified form of cutting member.

The invention is directed broadly to a machine for cutting a rivet after it has been placedin the article and at each side of the article preparatory to the forming of heads at each end of the rivet. The machine is particularly adapted for cutting the rivet preparatory to the riveting of a latch into a knitting needle. The cutting of the rivet is accomplished by two cooperating pairs of cutters. These cutters are preferably mounted so as to move horizontally relative to each other when cutting the rivet. The

lower pair of cutters is fixed and has no vertical movement. The upper pair of cutters is moved vertioallyin position for holding the article in which the rivet has been placed subsequent to the movement of the cutters relative to each other for cutting the rivet.

Positioning means is provided for posi tioning the rivet away from the cutting members when it is initially placed in the machine so that when the movable pair of cutting members are moved down to engage the article to hold the same, they will not disturb the rivet. This positioning means for the rivet is automatically withdrawn when the cutters are moved forward-to sever the rivet.

Referring more in detail to the-drawings, the improved rivet cutting machine consists of a supporting base 1 on which is mounted a bracket 2. Saidbracket is provided with an outwardly extending arm 3. Mountedto slide on the bracket 2 is a movable'head 4.

Said movable head 4 has a dovetail recess formed therein which receives a dovetailed projecting portion 6 carried by the bracket 2. A wear plate 7 is provided which is adjustablysupported by bolts 8-8 and the wear plate is for the purpose of taking up any wear between the movable head 4 and the bracket 2. Said movable head 4 is provided with an outwardly extending arm 9 which is spaced above the arm 3. There is a lower pair of cutting members 10 and 11 and an upper pair of cuttingmembers 12 and 13. The cutting members 10 and llare mounted on the outwardly extending arm 3. The cutting member 10 is stationary and has no movement whatever. The cutting member 11 is mounted in a slide 14 which is adapted to reciprocate in guideways formed in the arm 3. Said guide-way is dovetailed in cross section and the reciprocating member 14 is also dovetailed in cross section. A plate 15 which is secured by clamping bolts 16-16 to the arm 3 forms the outer wall of the dovetailed guiding recess for slide 14 andthis plate 15 may be shifted by means of the vertical adjustablestop screws l7-17, so as to take up any wear between the walls of the guiding recess and the slide 14. The holes through which the screws l6-16 pass are enlarged for this purpose. A spring 18 which is in the form of a single coil with projecting arms bears at one end against a portion of the'arm 3 and at its other against the slide 14 and normally holds the slide moved to its extreme position away from the stationary cutter, which is the position shown in Figure 2. I

The cutter 1:2 is fixed to the movable head 4 and held thereon by means of a clamping plate 19. Said cutter moves up and down with the movable head, but has no horizontal movement. The cutter 13 is carried by a slide 20 which is adapted to reciprocate in :1 suitable guide-way formed in the movable head 4. Said guide-way is similar to the guide-way for the slide 14 and the plate 21 forms the outer wall of the guide-way. Said plate is held in position by screws 22 and adjustable stop screws 23 are for the pur pose of. taking up wear between the walls of the guide-way and the slide 20. A s ring 24 similar in construction to the spring 18 normally moves the slide 20 outwardly to its extreme limit which is the position shown in Figure 2.

The movable head 4 is raised to its extreme upper position by. means of a spring 25. Said spring is seated at its upper end in .a. recess 26 in the head 4 and at its lower end in a recess formed in the main portion 2- of the standard. Said movable head 4 is lowered by means of a rock lever 27. Said rock lever 27 ispivoted at 28 to a supporting bracket 29 which is secured by suitable screws to the main standard 2. Said rock 1,aea,072

lever is provided with a forwardly projecting rm 30. Said forwardly projecting arm 30is provided with a threaded opening through which an adjustable bolt 31 passes. Said bolt bears on the upper end of the movable head 4. The arm 30 is split at its free end into said opening for the adjustable bolt 31 and a clamping screw 32 serves as a means for clamping the adjustable bolt 31 and holding it in adjusted positions. The rock lever :27 at the lower end of its arm carries a roller which bears on the face of a cam rigidly secured to a shaft 35. The shaft is mounted in a bracket 36 secured by bolts 3737 to the base portion 1. This cam 34 is provided with a rounded shoulder 38 which engages the lever when the shaft is moved from the position shown in Figure 1 and in a counter-clockwise direction and causes the movable head 4 to be depressed.

The shaft 35 is given a limited oscillation by means of an arm 39 which is rigidly secured to the shaft Said arm 39 at its rear end is provided with a pin 40 which extends into an elongated slot 41 in an arm 42.

The arm 4:2 is fixed to a shaft 43 carried by a bracket 44, secured to the table carrying the rivet cutting machine. Also, mounted on the shaft 43 is an arm 45 which carries a roller 46 adapted to bear on a cam 47 carried by a shaft 43. A spring 49 normally holds the arm 45 in contact with the cam and as the shaft 48 rotates the arm 45 will be oscillated and through the connecting devices referred to will oscillate the shaft 35 through a. limited distance. The shaft 35 will be moved in a counter-clockwise direction positively, while the spring 49 will retract the parts returning the shaft nd the cam carried thereby to the position shown in Figure 1. It will thus be seen that when the shaft 48 rotates the cam 47 will posi tively swing the arm 45 which will positively move the shaft 35 in a counter-clockwise direction. This will positively swing the rock lever 27 and positively move the movable head 4 downwardly. As SOOn as the cam 47 releases the arm 45, the spring moves said arm to the left, as viewed in Figure 1, and this will move the shaft 35 in a clockwise direction, releasing the rock lever 27 and permitting the spring 25 to raise the movable head 4.

The cutters are moved for cutting the rivet by means of a lever 50. Said lever50 is mounted to swing freely on a vertical pivot 51 which is fixed to the lugs 5252, and the lugs 5252 are in turn carried by the standard 2. Said lever 50 at its forward end carries two adjustable screws 53--54, These screws project through the arm, as clearly shown in Figures 2 and 3 and are adapted to bear respectively against the ends of the slides 20 and 14. The lever is slotted from its outer end into the threaded openings which carry the adjustable screws 53 and 54 and a bolt 55 passing through the slotted end of the lever serves as a means for clamping the screws 53 and 54: in their adjusted positions.

The cam 34 is provided with a cam plate 56 on the side thereof. The upper end of this cam plate 56 is beveled at 57. This beveled end of the cam plate 56 is so positioned as to engage the extreme left-hand end of the lever 50. Said left-hand end of the lever 50 is provided with a projecting nose 58 for this purpose. It will thus be seen that when the shaft 35 is rotated the lever 50 will be oscillated so as to cause the screws 53 and 54: to engage the slides carrying the movable cutters and move said cutters forward in order to cut the rivet. W hen the shaft 35 is moved in a clockwise direction, then the lever 50 is released and the springs 18 and 2 1 operating through the slides 14 and 20 respectively will swing the lever 50 to the position shown in Figure 2.

Attached to the movable head 4L is a bracket arm 59. Said bracket arm is secured by a clamping bolt 60 to said movable head. This bracket arm extends downwardly and across a plane lying between the pairs of cutting members. The purpose of this bracket arm is to position the article carrying the rivet for rutt-ing.

As above noted, the invention is particularly adapted for the cutting of a rivet which is used for securing the latch to a knitting needle. The needle is indicated at N in the drawings and the rivet at 1". This rivet is a threaded rivet and is threaded into an opening in the cheeks of the latch needle and through the latch and when it is first put into the needle said rivet has projecting ends which facilitate the placingof the rivet in the needle. These ends have to be cut off at each side of the needle just the distance from the side checks of the needle so that the ends of the remaining portion of the rivet may be riveted down. When the needle is placed in the machine, it is placed against the bracket arm 59, as

shown in Figure 6. The clamping plate 61 which holds the stationary cutter 10 is provided with a guide plate 62 which is inclined to the path of reciprocation of the slide 14 and extends to a point adjacent the cutting edge of the cutter 10. The purpose of this inclined guide plate is to guide the rivet so as to position the rivet between the cutting members. As noted, the rivet projects beyond the side faces of the needle, and one of the projecting ends of the rivet will engage this guiding plate 62 which is just below the cutters, and will insure that the projecting portions of the rivet are positioned between the cutters.

There is also a positioning plate 63 which normally extends up in front of the cutting edge of the cutting member 10 and this positioning plate is directly in rear of the rear edge of the guide plate 62 and serves to hold the rivet away from the cutting edge not only of the lower cutting member 10 but out of the path of the downward movement of the upper cutting member 12. This positioning plate 68 is carried by an arm 64 which is pivoted at 65 to a bracket 66 carried by the base plate 1 of the machine. Said bracket is secured to the base plate by screws 67. spring 68 rigidly secured to the bracket 66 bears on the underface of the arm es and normally raises the arm to the position shown in Figures 2,7 and 8 with the positioning plate up in front of the cutting edge of the cutting member 10. Adjustably secured to the arm 6 f is a cam plate 69 which has an upwardly projecting cam shoulder 70. This upwardly projecting cam shoulder 70 lies in the path of movement of the extreme outer end of the lever 50 and is so positioned that on the first forward movement of the lever 50 to operate the cutters the cam shoulder 70 will be engaged by the lever and the arm 64: swung downwardly to the position shown in Figure 3.

a stop screw 71 carried by the arm engages v the under portion of the projecting arm 3 and limits the upward movement of the positioning plate 63.

In order that the rivet, after being cut may exceed in length the thickness of the cheek of the needle and provide sufficient stock to form the rivet heads, I have formed the cutting edges of the cutters back from the surfaces of the cutters whichengage and hold the needle. In Figure 10, I have shown the cutters 11 as ground at 11*, so as to set the cutting edge 11 back from the surface 11 which engages and holds the needle. It is understood that the other outters are similarly constructed The cutaway surface in Fig. 9 is parallel with the surface 11 and is set back a sufiicient distance to provide the desired projecting length of rivet to form the heads.

direction of movement of the cutters and In Fig- I ure 10 the cutter is ground so as to form a both above and below the needle.

moves it into the machine by a sidewise movement until the needle shank strikes the positioning bracket arm 59. The rivet projecting below the needle engages the inclined plate 62 and will be guided to a position between. the cutters and will also heldaway from the cutting edges of the cutters 10 and 12 by the positioning plate (523. As the shaft 35 rotates, the movable head 4. moves downwardly and this occurs before any inward movement of the cutters takes place. This downward movement ofthe head t brings the upper pair of cutters into clamping or holding en gagement with the needle. The needle is not however very tightly gripped but just enough to hold it in place and the amount of gripping or the needle can be readily adjusted by adjusting the bolt 31. Inasmuch as the rivet is some distance away from the cutting edge of the cutter 12, it can be moved down into clamping position of the needle Without bending the rivet or stripping the edge thereof or in any way interfering with the rivet which projects upwardly from the hank oi the needle. After the needle is clamped then by continued rotation of the shaft 35 the lever 50. is oscillated which operates through le ver 64 on positioning plate 63 and withdraws it from its position between the lower pair of cutters and also operates on the slides 14 and 20 and causes the movable cutters to co-operate with the horizontal stationary cutters and sever the rivet After the shaft 35 has completed its oscillation and the rivet has been severed, then it oscillates in the opposite direction and as it moves in the opposite direction the cutters will be retracted and the movable head will be raised and the needle released. At the same time the positioning plate 63 moves into position for the placing of the next needle.

It is obvious that minor changes in the details of construction and the arrangement of the parts may be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described the invention, What I claim as new and desire'to secure by Letters Patent, is:

1. Arivet cutting machine including in combination, two pairs of cooperating cutters, means for operating the cutters in the respective pairs for cutting the rivet at each end thereof, and means for moving one pair of cutters bodily toward and from the other for clamping the article carrying the rivet to be cut and thus holding the rivet relative. to the cutters for the cutting action thereon.

2. A rivetcuttingmachine including in combination, two pairs of cooperating cutmeans for operating one of said pairs :xtting the rivet, automatic means for n10 ring the other pair of cutters bodily relative to the first-named pair of'cutters for clamping the article carrying the rivet to be cut, and for moving the cutters to out the rivet.

A rivet cutting machine including in combination, two pairs of cutters, means for movin one pair of cutters toward the other'for holding the article carrying the rivet to be cut, a positioning plate for positioning the rivet away from the cutters, and means for automatically moving said positioning plate away from the cutting region and for operating the cutters to cut the rivet.

A rivet cutting machine including in combination, a standard, a projecting arm carried thereby, a pair of cutters mounted on said arm, a movable head carried by the standard, a pair of cutters mounted on said movable head, means for moving the head to cause the upper pair of cutters to hold the article carrying the rivet to be cut, and means for moving one cutter in each pair for cutting the rivet.

5. A rivet cutting machine including in combination, a standard, an arm projecting therefrom, a pair of cutters carried by said arm, one of which is stationary and the other of which is movable, a movable head, a pair of cutters carried thereby, one of which is stationary on the head, and the other of which is movable, means for moving the head to cause the cutters to hold the ar icle carrying the rivet to be cut, and means for operating the movable cutters to cut the rivet.

6. A. rivet cutting machine including in combination, a standard, an arm projecting therefrom, a pair of cutters carried by said arm, one of which is stationary and the other of which is movable, a movable head, a pair of cutters carried thereby, one of which is stationary on the head, and the other of which is movable, means for moving the head to cause the cutters to hold the article carrying the rivet to be cut, means for operating the movable cutters to cut the rivet, a positioning plate for positioning the rivet normally away from the cut ters, and means for moving said plate subsequent to the action 01 the cutters.

I. A rivet cutting machine including in combination, a standard, an arm projecting therefrom, a pair of cutters carried by said arm, a movable head, a spring for normally raising the head, a pair or cutters carried by said head, a rock lever, means carried by the rock lever for engaging the head for moving the same downwardly to cause the out ters to hold the article carrying the rivet to be cut, an oscillating shaft, a cam carried thereby and adapted to actuate said rock lever, a lever for actuating the cutters to Cfllt the rivet, a second cam carried by said shaft adapted to actuate said lever subsequent to the downward movement of the head to cause the cutters to cut the rivet.

8. A rivet cutting machine including in combination, a standard, an arm projecting therefrom, a pair of cutters carried by said arm, a movable head, a spring for normally raising the head, a pair of cutters carried by said head, a rock lever, means carriedv by the rock lever for engaging the head for moving the same downwardly to cause the cutters to hold the article carrying the rivet to be cut, an oscillating shaft, a cam carried thereby and adapted to actuate said rock lever, a lever for actuating the cutters to cut the rivet, a second cam carried by said shaft adapted to actuate said lever subsequent to the downward movement of the head to cause the cutters to cut the rivet, a positioning plate for engaging the rivet to position the same back from the cutting edges of the cutters,yielding means for raising the positioning plate to its normal operative position for engaging the rivet, and means actuated by the lever operating the cutters for withdrawing said positioning plate prior to the movement of the cutters to cut the rivet.

9. A rivet cutting machine including in combination, a standard, an arm projecting therefrom, a pair of cutters carried by said arm, a movable head, a spring for normally raising the head, a pair of cutters carried by said head, a rock lever, means carried by the rock lever for engaging the head for moving the same downwardly to cause the cutters to hold the article carrying the rivet to be cut, an oscillating shaft, a cam carried thereby and adapted to actuate said rock lever. a lever for actuating the cutters to cut the rivet, a second cam carried by said shaft adapted to actuate said lever subsequent to the downward movement of the head to cause the cutters to cut the rivet, a positioning plate for engaging the rivet to position the same back from the cutting edges of the cutters, yielding means for raising the positioning plate to its normal operative position for engaging the rivet, means actuated by the lever operating the cutters for withdrawing said positioning plate prior to the movement of the cutters to cut the rivet, and an inclined guidev plate for directing the rivet in front of said positioning plate.

10. A rivet cutting machine including two pairs of cutters, means for supporting one pair of cutters whereby it may be moved toward and from the other for engaging the article carrying the rivet to be out, a single lever for operating the cutters to cut the rivets, a rock lever for actuating the supporting means for the movable pair of cutters, a positioning plate for positioning the rivet away from the cutting edges of the cutters, an inclined guide plate for directing the rivet in front of the positioning plate, means whereby said lever for actuating the cutters operates to position the plate prior to the movement of the cutters to cut the rivet, an oscillating shaft, means for positively moving said oscillating shaft in one direction and for yieldingly moving said shaft in the opposite direction, a cam carried by said shaft and adapted to engagethe rock lever when positively moved for lowering the movable cutters into contact with the article carrying the rivet to be cut, a second cam carried by said shaft and adapted toengage said lever for operating the cutters, said cams being so disposed that the cutters are first lowered into engagement with the article and the cutters are subse quently operated to cut the rivet.

11. A rivet cutting machine including in combination, two pairs of cutters, a movable head carrying one pair of cutters, a rock lever for moving said head downwardly, an adjustable bolt carried by the rock lever and engaging said movable head, a spring for raising said movable head, and means for operating the cutters after the head has been lowered to hold the article for cutting the rivet.

12. A rivet cutting machine including two pairs of cutters, one of which is movable for clamping the article holding the rivet to be out, a bracket arm adapted to engage the article for positioning the same between the cutter, a positioning plate for positioning the rivets away from the cutting edges of the cutter, an inclined guide plate for directing the rivet in front of the positioning plate, means for moving the pairs of cutters toward and from each other, and means for operating the cutters to cut the rivet.

13. A rivet cutting machine including in combination, two pairs of cutters, means for moving one pair of cutters toward the other for holding the article carrying the rivet to be cut, and means for operating the cutters to cut the rivet, said cutters engaging the article having their cutting edges set back from the article to provide sufficient rivet stock to form the heads.

14:. A rivet cutting machine including in combination, two pairs of cutters, means for moving one pair of cutters toward the other for holding the article carrying the rivet to be out, and means for operating the cut-- ters to cut the rivet, said cutters being ground on their faces engaging and holding the article so as to form cutting edges set back from said holding surfaces.

In testimony whereof, I afiix my signature.

JOHN A. CALDER. 

